twentyeight
Veteran Member
I'm rebuilding a 1Z with ALH pistons to go into a Eurovan. I neglected to have the machine shop weigh my pistons, so I'm dealing with it now. If I balance all of pistons (sans pin) and swap pins around I can get the whole piston/rod assembly within 300mg, and 1/4 & 2/3 will be identical.
Charts at the end of the page here: http://andrewclink.com/projects/thebus/rotating-assembly
1) Can I drill the underside of the piston between the pin bosses to lighten them? Can I get 3 grams out of them there?
2) Can I switch pins or are they a matched set in terms of fitment? These are brand new .5 oversized Nüral ALH
3) Is this worthwhile, or am I close enough without messing with it at all? It'll probably spend most of its time around 2600-2700 (66-68mph).
Charts at the end of the page here: http://andrewclink.com/projects/thebus/rotating-assembly
1) Can I drill the underside of the piston between the pin bosses to lighten them? Can I get 3 grams out of them there?
2) Can I switch pins or are they a matched set in terms of fitment? These are brand new .5 oversized Nüral ALH
3) Is this worthwhile, or am I close enough without messing with it at all? It'll probably spend most of its time around 2600-2700 (66-68mph).